[tanishalala]

Question attached as image. Thanks in advance. Sorry for the bad translation. I can’t solve B

[Borek]

Looks like a trivial stoichiometry, what have you tried and why it didn't work?

[tanishalala]

Looks like a trivial stoichiometry, what have you tried and why it didn't work?

So I tried:
Calculating the Volume so I could use M1V1=M2V2
But I don’t know how to calculate the volume. Also converted PH3 to moles (0,0294) but not sure what to do with it next. The moles I converted is with the molair mass of PH3 divided by the one gram. Tried dividing it with 4 since the ratio PO3 with PH3 is 4. So I’m not really sure if I’m close to anything but I really really can’t figure it out..
I tried so many more things but erased them out of frustration sorry.

[Borek]

Calculating the Volume so I could use M1V1=M2V2

There is no dilution here, I am afraid this formula won't help.

converted PH3 to moles (0,0294)

Good starting point.

Look at the reaction equation: how many moles of the starting material is required to produce that number of moles of PH₃?

Do you know any formula that combines number of moles, volume and concentration of the substance?

[sjb]

Also, compare https://www.reddit.com/r/chemhelp/comments/s9me89/cant_solve_b_thanks_in_advance_been_on_this_for/